Threats linked to ambush of Smith Letter writer focus of investigation By Yolanda Jones yojones@gomemphis.com June 4, 2002 Investigators believe the anonymous author of threatening letters about Dr. O. C. Smith last year is the same culprit who ambushed the medical examiner this weekend. Smith was attacked outside his office about 10 Saturday night by a man who threw a chemical substance in his face and then wrapped him in barbed wire and strapped a home-made bomb to his chest. "There is a good chance that the man who wrote these letters is the bomber," ATF agent Jim Cavanaugh said...